OpenTrailPaper is firmware for the LilyGO T5S3 4.7″ E-Paper PRO. It shows ride data and offline maps, follows GPX routes, records FIT files and connects to Bluetooth sensors. You buy and protect the board yourself.
Each item shows the screen it describes. Use the orange touch target on the device to move between related screens.
The iOS companion can plan and transfer routes, build offline maps, copy recorded rides, change settings and install firmware updates over Bluetooth. The head unit does not need the phone during a ride.
After routes and maps are loaded, the head unit can record and navigate by itself. There is no account or subscription. The app is used when you want to prepare or transfer data.
OpenTrailPaper currently targets the LilyGO board below. It is a development project, not a finished or weatherproof retail product.
ESP32-S3 · 16 MB flash · 8 MB PSRAM · 960×540 e-paper · BLE 5
Suggestions and pull requests welcome
A better target board would include a barometric altimeter, multi-band GPS, magnetometer, larger battery, usable hardware buttons and a weatherproof case. If you know of one,open an issue. Board ports are also welcome in thesource repository.
The setup page flashes the board over USB and can build basic offline maps. It requires a desktop Chromium browser; the iOS app produces maps with elevation data.
Thank you to the organizations supporting OpenTrailPaper.